Heating stove



C. S. KNOWLES Wee. 25 1923.

HEATING STOVE Filed March 19, 1925 INVENTOR Qea/JMwa/m BY 1 r J F ATTORNEY Patented Dec. 25, 1923.

CECIL S. KNOVJLES, OF SEATTLE, WASHINGTON.

HEATING STOVE.

Application filed March 19, 1923. Serial No. 626,004.

which the following is a specification.

My invention has particular reference to a superstructure for heating stoves designed to increase the heat giving qualities thereof, and at the same time conserve fuel.

lVith said objects in view, I provide a plurality of horizontal superimposed members forming adjacent passageways for conducting smoke and air in sinuous paths and in transverse directions to each other.

I also provide, in connection with said assembly and the body of the device, a pair of oppositely located smoke chambers, one of which is equipped with a fixed deflector for diverting the products of combustion through the proper medium, and the other with a pair of hinged deflector-s for the same purpose, and also to afiord a straight draft to the smoke outlet when the same are in lowered position.

In said connection, I also provide a pair of oppositely located air chambers, with fixed deflectors for diverting the air through the proper conductors, with means for isolating said chambers from the smoke chambers, for entrance of outside air, and the diffusion of heated air.

In the accompanying drawing- Figure 1 is a cross section of the device, drawn on the line 1-1 oi Fig. 2, the outlets for air and smoke being indicated by dotted lines.

Fig. 2, a vertical sectional view of the entire device, drawn on a line as indicated by 22 of Fig. 1, the broken sections indicating the outlets for air and smoke, and the stove to which the structure is mounted; said view particularlyillustrating the course taken by the products of combustion from the stove proper through the device.

F ig. 3, a vertical sectional view of the same-drawn on a line as indicated by 33, Fig. 1, indicating the entrance for air. its outlet partly brokenaway, and a broken section of a stove; said view being directed particularly to the course taken by air in passing through the device.

In the present embodiment of the invention, the drum-like body 1 is provided with an extension 2 depending from the bottom,

adapted to lit over and to be secured to the open end of a stove body 3. Obviously, however, the device can be made integral with a stove, if desired. 1 denotes a door, 5 an open outlet for heated air, and 6 a smoke outlet to a chimney.

The conductors of smoke 7 and the con-' 7 duotors of air 8 comprise hollow members of sheetmetal, rectangular in form, having open opposite ends, and superimposed alternately, the open ends of theconductors of smoke being disposed transversely to the open ends of the conductors of air. They are secured to the front angular supports 9 and the rear angular supports 10, Fig. 1, preferably by spot welding; said supports extending the length of the body, and being secured thereto by spot welding or in any manner which will insure suitably tight joints.

This construction provides two oppositely located smoke chambers, the front one being designated as 11 and the rear one as 12, and two oppositely located air chambers 13 and 14. The open ends of the smoke conductors 7 connect with the chambers 11 and 12, as indicated in Fig. 2, and the open ends of the air conductors communicate with the air chambers 13 and 14, as indicated in Fig. 3. The air-tight connections 9 and serve, as is evident, to isolate each pair of chain bers and prevent any commingling of free air drawn into the device and the products of combustion from the stove. V

Hinged deflector plates 15 and 16 are mounted within the chamber 12, and conform closely to the interior contour of the chamber. When disposed in closed position, as indicated in Fig. 2, they are designed to obstruct the free upward movement of the products of combustionand direct the same laterally through the smoke conductors 7, as indicated by the arrows. A deflector plate 17, of the same form and located centrally of the chamber 11, is fixedly attached thereto and adapted to perform the same function.

A rod 18, forming a part of the hinged connection of the plate 15, has-one end extending through the body and carries a lever 19. Fig. 1. A similar rod also extends from the piate 16, likewise carrying a lever of the same construction. By actuating these levers said hinged plates are lowered to the positions shown by the dotted lines 20 and 21, Fig. 2. Should it be deemed desirable, it is obvious that a suitable connection can be made between each of these levers so that the two can be actuated simultaneously. When starting a fire in a stove it is quite necessary that a full, free draft be had, and the lowering of these plates, as thus described, affords a straight upward outlet for the smoke-and su'bserves said pur pose.

The air inlet 22-, Fig. 3, is an opening in the body which communicates with the lower air conductor 8, and in size is a proximately the same as the adjacent open end of said conductor. The conductor just referred to is seated on the bottom of the drum and being near to the burning fuel is adaptedto impart a'hig'h degree of heat to the air as it enters the device through said Opening. A deflector plate 23, being in form the same as the plate 17, is fixedly attached to the air chamber 14 and adjacent the air inlet 22; It provides means, in connection with said inlet, by which the air has an unobstructed passage to the lower air conductor 8. The deflector plate 24:, in the air chamber 13, and the plate 25 in the air chamber 14:, are identical in construction with the plate 23 and serve to divert the air laterally through the air conductors on its upward course.

As it will be noted in Fig 2, the lower end of the air outlet 5 extends through the top of the drum and communicates with air conductor 8. Its connection with this upper air conductor is necessarily air-tight to prevent the escape of any products of'combustion from the upper smoke conductor 7, through the air outlet 5. 26 in Fig; 2, indicates the manner in which the rear end of the upper sinoke conductor 7 is cut away to afford a larger opening through which the smoke is conveyed to the pipe (i'f'lOlTi said conductor, as indicated by the arrows In utilizing this invention in or with a stove, the hinged deflector plates are first turned down, to provide a straight draft, to get the fire well started. When this is attained, said deflector plates are returned to the horizontal positions shown in Fig. 2, when the device is ready for its particular use. The product of combustion, ascending by the circuitous route indicated by the arrows in Fig. 2, will conserve fuel and also disseminate more heat than if said products went directly up the stove pipe. Air entering the inlet provided therefor is in close proximity to the hottest part of the stove, it becomes heated, and circulating through the medium shown in Fig. 3, it eventually ascends through the open air outlet 5 and diffuses heated air through the premises to be warmed. If desired, an extension can be placed on the pipe 5, and heated air directly conveyed to a room other than the one in which the stove is located.

The door of the device opens on the front smoke chamber, and when it is necessary to remove soot, or the like, from the smoke conductors, this can I be accomplished by opening the door and lowering the hinged deflectors, when said accumulations can be raked backwardly into the rear smoke chamber, and from there will fall into the stove.

As will be obvious to those skilled in the art, changes in and modifications ofthe construction described may be made without departing from the spirit of my invention or sacrificing its advantages.

I claim:

1. A device of the class described, comprising a body, a plurality of smoke conductors and air conductors, consisting of'hol-' low, flat members provided with open opposite portions, said members being superimposed so as to form adjacent passageways for conducting smoke and air in sinuous paths and in transverse directions to each other, supports therefor, smoke and air chambers communicating with the smoke and air conductors respectively, an air inlet, an air outlet, a smoke outlet, means for producing a circulation of combustion prod ucts through the smoke conductors, means for effecting a circulation of air through the air conductors, and means for preventing a cominingling of said p'rodu'etsand air.

2. A device of the class described, comprising a drum-like body, a door therefor, means for operatively securing the body to a stove, a pluralit of smoke conductors and air conductors, consisting of hollow, rectangular members having open opposite ends,said members being superimposed so as to form adjacent passageways for conducting smoke and air in sinuous paths and in transverse directions to each other, supports providing air-tight connections between the corners of the members and the body,- a front and a rear smoke chamber disposed between the members and the body and communicating with the smoke conductors, a pair of oppositely located air chambers disposed between the members and the body and communicating with the air conductors, hinged deflectors disposed in the rear chamber, means for actuating the same, an air inlet in the body and communicating with the lower air conductor, fixed deflecting means in said front and air chambers, an airout let and a smolzeoutlet,

3. In a stove, a pluralityof smoke con-,,

ductors and air conductors, comprising hollow, flat members provided with open opposite portions, said members being superim;

posed so as to form adjacent passageways a for conducting smoke and air in sinuous paths and in transverse directions to each other, means for producing a cir'ciil'ation of combustion products through the smoke conductors, means for effecting a circulation of air through the air conductors, and means for preventing a commingling of said products and air 4. A device of the class described, comprising in combination with a stove, a plurality of smoke conductors and air conductors consisting of hollow, flat members pro vided with open opposite portions superimposed so as to form adjacent passageways 1 for conducting smoke and air in slnuous paths and in transverse directions to each other, supports therefor, means for produc ing a circulation of combustion products through the smoke conductors, an air inlet, means for effecting a circulation of air through the air conductors, an air outlet, and means for preventing a commingling of said products and air.

CEOILQS. KNOWLES. 

